org.picketlink.identity.federation.web.util.SecurityActions Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.picketlink.identity.federation.web.util;
import java.security.AccessController;
import java.security.PrivilegedAction;
/**
* Privileged Blocks
* @author [email protected]
* @since Dec 9, 2008
*/
class SecurityActions
{
static Class loadClass(final Class theClass, final String fqn)
{
return AccessController.doPrivileged(new PrivilegedAction>()
{
public Class run()
{
ClassLoader classLoader = theClass.getClassLoader();
Class clazz = loadClass(classLoader, fqn);
if (clazz == null)
{
classLoader = Thread.currentThread().getContextClassLoader();
clazz = loadClass(classLoader, fqn);
}
return clazz;
}
});
}
static Class loadClass(final ClassLoader cl, final String fqn)
{
return AccessController.doPrivileged(new PrivilegedAction>()
{
public Class run()
{
try
{
return cl.loadClass(fqn);
}
catch (ClassNotFoundException e)
{
}
return null;
}
});
}
/**
* Get the system property
* @param key
* @param defaultValue
* @return
*/
static String getSystemProperty(final String key, final String defaultValue)
{
return AccessController.doPrivileged(new PrivilegedAction()
{
public String run()
{
return System.getProperty(key, defaultValue);
}
});
}
}